1. Excited state isomerization in a new ruthenium chelating sulfoxide complex
- Author
-
Mockus, Nicholas V., Marquard, Seth, and Rack, Jeffrey J.
- Subjects
- *
ISOMERIZATION , *SULFOXIDES , *PHOTOCHROMIC materials , *PHOTOCHROMIC polymers , *EMISSION spectroscopy , *ATOMIC emission spectroscopy , *RUTHENIUM - Abstract
Abstract: Electrochemical and photochemical studies of a photochromic complex with a chelating sulfoxide are reported. Electrochemical data do not support evidence for isomerization following electrochemical oxidation. However, irradiation of solutions containing [Ru(bpy)2(PhNSO)](PF6)2 (bpy is 2,2ā²-bipyridine, PhNSO is N-benzylidine-2-(ethylsulfinyl)ethanamine) demonstrate excited state SāO isomerization. The S-bonded absorption maximum is 382nm, while the O-bonded isomer features absorption maxima at 360 and 486nm. The quantum yield of isomerization is 0.033 and the S-bonded isomer is emissive at low temperature (77K). These data and an electronic structural model explaining this reactivity are introduced. [Copyright &y& Elsevier]
- Published
- 2008
- Full Text
- View/download PDF